Direct observation of the β-carotene reaction with hydroxyl radical.

  title={Direct observation of the β-carotene reaction with hydroxyl radical.},
  author={Chang-Hui Chen and Rui-Min Han and Ran Liang and Limin Fu and Peng Wang and X. Ai and Jian-Ping Zhang and Leif H Skibsted},
  journal={The journal of physical chemistry. B},
  volume={115 9},
Hydroxyl radical reacts readily with β-carotene following submicrosecond laser photolysis of N-hydroxypyridine-2(1H)-thione (N-HPT) as a "photo-Fenton" reagent generating hydroxyl and thiyl radicals in acetonitrile:tetrahydrofuran (4:1, v/v) solution. On the basis of spectral evidence, and supported by kinetic considerations and thermodynamic calculations, a short-lived transient species, detected by time-resolved absorption spectroscopy with an absorption maximum at ∼750 nm and a lifetime of… CONTINUE READING
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